1. eighty-third - Noun
2. eighty-third - Adjective
eighty-third
The ordinal form of the number eighty-three, describing a person or thing in position number 83 of a sequence.
The answer appears on the eighty-third page of the book.
She finished eighty-third in the race.
eighty-third (plural eighty-thirds)
One of eighty-three equal parts of a whole.
An eighty-third of 1660 is 20.